Piston-packing.



W-.-J. WRIGHT.

PISTON PACKING.

APPLIGATION FILED MAR. 12, 1913.

1,097,669; Patented May 19, 1914.

' w/mEsss.

tightly as to cause WILLIAM JAMES WRIGHT, 9F FRQJNJZLIEI, PENESYLVAS'IQ.

rrsron s'aonrna.

meshes.

specification of setters llatent.

Application filed March 12, 15313. serial lte. WBJYQE A To all whom it may concern:

Be it known thatil, Winn nu J. WRIGHT, resldmg at Franklin, 1n the'county ot' Vo nango and State of Pennsylvania, have in vented certain new and useful Improvements 1n Piston-Packing, of winch the tollowing IS a specification.

My invention relates to certain new and useful improvements in packing rings for pistons, and it has for its object a packing ring construction which isparticularly adaptable for useWit-h high pressure internal combustion engines.

l have found that in many instances the ordinary packing rings commonly employed will be jammed against the cylinder walls so undue wear and soon render the rings useless as well as unduly increasingthe clearance between the piston and cylinder walls. This objectionable" ac tion is caused by leaking of the gases which,

' whenthe piston is operating under the force of explosion, will hld the packing ring down tight against the bottom of the groove and by leaking in between the firing and the piston. side, the ring is caused to expand under the full pressure of the exploded mixture and thereby exert undue friction on the cylinder wall.

iiLS will be well understood by those skilled in the art, packing rings are of a less height than that oii'the piston groove, therefore on the up stroke of the piston, the ring will tend to seat on the bottom of the piston groove and on the down stroke of the piston, the ring is supposed to (and will usually when but low pressures arise in the working chamber) seat against the upper surface of the groove wall. Whe uhowever, high pressures are generated in the engine, the ring does not always seat on the upper wall of the groove as it should, and hence the objectionable action of the leaking gases.

It is, therefore, the primary object of my invention to overcome these objectionable features. This, I accomplish by providing means for continuously tending to hold the packing ring up against theupper Wall of.

the piston groove and also, if desired, provide means for tending to expand or spread the ring to hold it in contact with the cylinder wall.

More subordinately, the inv ntion includes those novel details of construction, combination and arrangement of carts, all of which W111 be fully describ to provide ed andv then I be specifically pointed out in the appended" claims, reference being had to the accompa-* nying drawing, in which I Figure l. is a detail section showing one form of the invention. Fig. 2 is a cross section on the line 2 $2. of Fig: 1. Fig. 3 is a detail section showing a modification of the invention. Fig. l is a horizontal section on the line of Fig. 3. Fig. 5 is a detail section of a'further modification. Fig. ii is a cross section on the line 6-6 of, Fig. 5. Fig. 7 is a detail. View of the zigzag spring which is employed in the form sliown in Fig. 1

.ln the drawing, 1 designates the piston and 10 the cylinder, the piston having the usual annular ring groove 2 which is usually of rectangular cross section, with the upper wall 7 of the same paralleling the head of the piston.

3 designates the piston ring which may be of the usual construction save that when Patented May 1%, rate.

usedinconnection with my invention, the

ring 3 is provided wit-ha groove 2 on its underside to register with a. corresponding groove 5 in the lower wall of the piston groove, between which grooves t and 5, a spring 6 is seated, the spring 6 may be a Zig zag wire bent into a ring shape to fit into the groove 2, instead of employing the spring 6 and grooves 4i and 5, coil springs '8 may be used, m which event, the ring and piston 1 are provided with sockets shown in Fig. 3 to receive such springs. instead of making the upper walls 2 of the groove extend at wall 2 and parallel with the piston head, the same 'may be beveled outwardly as shown in Fig. 5 so that the spring, in forcing the ring 3 upwardly, also tends to eliect an enpanding moven'ient or spreading of the ring 3 toward the Wall of the cylinder 10.

In employing my lIlVQlllllOl'l, instead of using the ordinary type of split ring, a ring may be employed formed of several sections and in which event, the abutting ends of the ring sections may he recessed at 11 (see Fig. 6) and provided with spreading coil springs 12 to tend to expand or spread the ring.

In operation, the springs 6 or 8, as the case may be, are so designed ,as to hold the ring 3 in the positions shown in Figs 1, 3 and 5 during the compression stroke of the piston instead of letting the rings lag back to the bottom of the groove, thus escahe pass the piston head between the rings and right angles to the side the upper sui'faeeior 9 of the groove 2 is avoided and hence there is little or no denfier of the gases undenpressiire working back between the rings 3 and the side wallbf the groove 2- and exerting undue tend-.

enogy toward the spreading of the ring,

Fiom'. the foregoing description, taken in connection with the accompanying drawing,

- it iq thought the complete construction, opera ring groeve, of a Siiit ring held in said.

groove, the width of said ring being less than the width of the gi-oeve, said ring and said pisten having opposing spring pockets, and. e spring mounted in and protected by tend to force said Pockets to eontinuouz iz, v H

e opposite we said ring into contact "with eifl ie' piston groove.

2. In eombinzition with; a. piston having an annular piston groove, one face of whieh is beveled outwardly, of an annular split piston ring mounted in said groove, the width of said ringheing less than the width of the groove, said ring and said piston havilig contacting faces, the op osingcontacting faces opposite the bevele faces being not, mal to the axis of the pist0n,'and said piston and said ring each having an annular spring groove adjacent said normal feces, and a zigzag spring in said ooves. i "WILLIAM AMES WRIGHT.

Witnesses: I

Ross-Bi? N. SPEER, D. U. Amen. 

